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Patented May 31,1881.

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O. F. TRIPP. Knitting Machine.

Patented May 31, I88l.

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Patented May 31, 188|.

INVENTOR- co a (L) rvu/QM, AT'ToRNEY UNITED STATES PATENT EEICE.

OTHNIEL F. TRIPP,OF BATTLE GREEK, MICHIGAN, ASSIGNOR TO THE WESTERN HEALTH REFORM INSTITUTE, OF SAME PLACE.

MACHINE.

SPECIFICATION forming, part of Letters Patent No. 242,168, dated May 31, 1881.

Application filed March 24, 1880.

Battle Greek, in the county of Calhoun and State of Michigan, ha\'e invented certain new and useful Improvements in Knitting-Maf` chines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

The invention relatesniore particularly to knittingmachines adapted to knit a fabric having its stitches formed from two different threads. These machines employ two series .of needles, and are intended to employ two different colored threads, one series 'of needles forming stitches from one colored vthread and the other series of needles forming stitches from tbe'remaining colored thread. The necdles of one series alternate with the needles of the other series in the needle-bed, and they operate to produce a fabric having vertical stripes of two different colors alternating with each other on its face side.

The main object of my invention is to separate the two series of needles from each other prior to their forwardstroke and conduct them to two different advancing-cams.

A further'object of my invention is to provide novel mechanism for automatically raising or lowering the cam-plates.

With the above ends in view the invention consists, first, inthe combination, with two independent advancing-cams, of a cam device adapted to separate two series of needles and conduct each series to its appropriate advancing-cam; second, in the c ombination, with a carriage having a slide provided with a cam-f groove, of a cam-plate having a projection fit` ting in said groove, and stops which shift they slide at the termination of the strokes of the carriage. y

The drawings represent the invention as p adapted for straight knitting. It is apparent,

however, that by suitable mechanical'changes the invention may be adapted for* circular knitting.

(Model.)

Figure l is a perspective view of the principal parts of a Lamb knitting-machine, showing some of my improvements attached. Fig. 2 is a detail View, representing the under or working face of one of the cam-plates.' Fig. 3 is a detail view, representing the cam-plate, and mechanism for raising and lowering it,

with the exception of the stops which are shown in Fig. 1. Fig. 4 is a detail view, in perspective', of one of the slides which operate in raising or lowering the cam-plates. Fig. 5 is a detail sectional view of the needle-bed, showing in position one of each of the two series ot' needles. Fig. 6 represents one of each of the two series of needles. Fig. 7 represents, on a magnified scale, the face side of the fabric produced by the machine. Fig. 8 is a similar view, representing the back side of the fabric.

Each cam-plate P is provided with two'independent advancing-cams, A and F, and two independent withdrawing-cams, Yand Z. The cam F is located in line parallel with and below cam A. The cams Y and Z lare located respectively at different distances beyond the advancing-cam mechanism.

In advance or to the forward side of cam A are located the two cams B and C, the cam C being located in front of cam B and projecting from the cam-plate a greater distance than does cam B.

The needles are divided into two series, one

` series, S, having their length of body less than the other series, L, and also having their butts kformed shorter than the butts 7c of the longbody series. As the camplate passes from right to left the long butts of the one series of needles, L, are adapted to engage with cam B, and are conducted rearward by thelatter until said butts are out of transverse line with cam A. The short butts of the other series ot' needles, S, are not of sufficient length to engage with cam B. The short-butt series S are thus adapted to be engaged by cam A, and by the latter to be moved in their forward stroke.

The long-butt'series L are brought into position to be engaged by cam F, and by the latter to bel moved in their forward stroke.

Each cam plate P has its upper portion hinged at the two points H to the reciprocating carriage N. It is provided with a trans- IOC verse arm, O, projecting from its lower middle portion, and fitting in a camgroove, It, formed in a slide, G, which latter is mounted on the reciprocating carriage. This slide is adapted to engage with two stops, G G2, located respectively at the ends ot' the machine-frame. As the carriage completes its return-stroke, traveling from left to right, the slide engages with stop G', which operates to move the transverse arm into the lower portion ot' the camgroove, and thereby correspondin gl y lower the cam-plate. The calli-plate is thus in position to have its cams suitably engage with the butts of the needles during the forward stroke of the carriage. As the carriage completes its forward stroke, traveling from right to left, the slide engages with stop (i2, the transverse arm is thereby moved into the upper portion of the cam-groove, andthe canrplate is correspondingly raised, and the cam-plate is in position to have its cams clear the butts of the needles during the return-stroke ot' the carriage.

The withdrawing-cams may he made adjustable by slot and clamp-screw device, as illustrated in Fig. l, so as to vary the length of the stitches.

To operate the machine the two series of needles are placed in the needle-bed in a relative position, dependent upon the style of fabric to be produced. If the fabric is to have the alternate vertical stripes of its face side formed cach of a single stitch in a course, then single needles of the two series alternate with each other in the needle-bed. If the fabric is to have the alternate vertical stripes of its face side formed each of two or more stitches in a course, then sections of two or more needles of the two series alternate with each other in the needle-bed. As the cam-plate passes from right to left the short-butt series separate from the long-butt series. The short-butt series, being engaged by cam A, are driven to thc termination of their forward stroke, and there remain stationary for a certain interval of time. The long-butt series engage with cam B, and are thus conducted to cam F. At the termination of their forward stroke they take one of the two different colored threads, and by engagements with their cam y they are at once withdrawn. The relative location of the two withdrawing-cams is such that when the longbutt series have accomplished aportion of their backward stroke the shortbutt series take the remaining one of the two different colored threads, and by engagement with cam z are withdrawn. By reason of one series being thus maintained stationary at the termination of their forward stroke both series are respectively adapted to take different threads in forming their stitches.

Figs. 7 and S represent respectively the face and back side ofthe fabric produced. One colored thread, l), appears in alternate vertical stripes upon the face side of the fabric, and is overshot upon the back side of the fabric by the other colored thread, E. This thread E appears in alternate vertical stripes upon the face side ofthe fabric, and is overshot upon the back side of the fabric by thread D.

The technical word overshot, it will be understood, is applied to work in which one thread passes over the stitches of another thread.

The drawings represent stripes formed each of a single stitch in a course.

Having fully described my invention, what I claim as new, and desire to secure by Letters Iatent, is

1. In aknitting-machine which knits afabric having its stitches formed from two different threads, the combination, with two series of needles, respectively having butts of different lengths, and a cam-plate, of two independent advancing-cams adapted to advance the two series of needles by separate paths in their respective forward strokes, and a caln device adapted to separate the two series of needles from each other and conduct each series to its appropriate advaucingcam, substantially as set forth.

2. In a knitting-machine which knitsafabric having its stitches formed from two different threads, the combination, with two series of needles, a cani-plate, and two independent advancing-cams, of a cam device adapted to separate the two series of needles from eachother and conduct each series to its appropriate ad vancing-cam, and two independent withdrawing-cams, adapted to withdraw the two series of needles by separate paths, substantially as set forth.

3. In aknittiug-machine which knits a fabric having its stitches formed from two different threads, the combination, with two series of needles of different lengths, havingbutts of different lengths, a cam-plate, and two independent advancing-cams, of a cam device adapted to separate the two series of needles from each other and conduct each series to its appropriate advancing-cam, and two independent withdrawing-cams, substantially as set forth.

4. In a knitting-machine, the combination, with two series ot' needles of ditferent lengths, having butts of ditlerent lengths, a cam-plate, two advancing and two withdrawing cams, arranged with reference to each other, as described, ot a separating device consisting of the cams B and C, substantially as set forth.

5. In a knittingmachine which forms afab ric having its stitches kuit from two different threads, the combination, with two series of needles, a cam-plate, and two independentadvancing-cams, located one below the other, of two independent withdrawing-cams, located respectively at different distances beyond the advancing-cam mechanism, substantially as set forth.

6. In a knitting-machine which forms afabric having its stitches knit from two different threads, the combination, with two series of needles of ditterent lengths,having butts of dif- IOO ferent lengths, and a cam-plate, of two independent advancin g-`carns, located one below the other, and two independent Withdrawin g-cain s, located respectively at different distances beyond the advancing-cam mechanism, substantially as set forth.

7. In a knitting-machine, the combination,

with a cam-plate adapted to rise and fall, a

projection extending therefrom, and a reciproeating carriage, of a slide fitted on the latter and provided with a cam-groove in which the projection fits, and stops adapted to be engaged by the slide at the termination ofthe opposite strokes of the carriage, thereby shifting the slide and causing the cam-plate to be raised or lowered, as the case may be, substantially as set fort-h.

OTHNIEL F. TRIPP.

Witnesses: l

HENRY W. KELLOGG, A WILLIAM H. EDWARDS, Jr. 

